Fixed timing issue with validation images

tests/validation/config.json

@@ -5,15 +5,13 @@
       "title": "Chibi Rex",
       "playgroundId": "#QATUCH#4",
       "renderCount": 50,
-      "referenceImage": "chibi_rex.png",
-      "excludeFromAutomaticTesting": true
+      "referenceImage": "chibi_rex.png"
     },     
     {
       "title": "Yeti",
       "playgroundId": "#QATUCH#3",
       "renderCount": 150,
-      "referenceImage": "yeti.png",
-      "excludeFromAutomaticTesting": true
+      "referenceImage": "yeti.png"
     },   
     {
       "title": "Sponza",

tests/validation/validation.js

@@ -131,10 +131,13 @@ function evaluate(test, resultCanvas, result, renderImage, index, waitRing, done
 }
 
 function processCurrentScene(test, resultCanvas, result, renderImage, index, waitRing, done) {
+    currentScene.useConstantAnimationDeltaTime = true;
+    var renderCount = test.renderCount || 1;
+   
     currentScene.executeWhenReady(function () {
-        var renderCount = test.renderCount || 1;
-
-        currentScene.useConstantAnimationDeltaTime = true;
+        if (currentScene.activeCamera && currentScene.activeCamera.useAutoRotationBehavior) {
+            currentScene.activeCamera.useAutoRotationBehavior = false;
+        }
         engine.runRenderLoop(function () {
             try {
                 currentScene.render();